usb host鼠标不能使用原因

linux kernel 3.4.5的板子插入USB鼠标，出现例如以下错误LOG：

[  191.177508] Plug in USB Port2

[  191.363516] usb 1-1: new full speed USB device number 10 using Mstar-ehci-2

[  191.578860] First get dev desc failed

[  192.413517] usb 1-1: device not accepting address 10, error -71

[  192.453519] ==13==> hub_port_init 1

[  192.457483] Plug in USB Port2

[  192.643505] usb 1-1: new full speed USB device number 11 using Mstar-ehci-2

[  192.857818] First get dev desc failed

[  193.693513] usb 1-1: device not accepting address 11, error -71

[  193.733526] ==13==> hub_port_init 1

[  193.737493] Plug in USB Port2

[  193.923514] usb 1-1: new full speed USB device number 12 using Mstar-ehci-2

[  194.137859] First get dev desc failed

[  194.973524] usb 1-1: device not accepting address 12, error -71

[  195.013520] ==13==> hub_port_init 1

[  195.017485] Plug in USB Port2

[  195.203527] usb 1-1: new full speed USB device number 13 using Mstar-ehci-2

[  195.417873] First get dev desc failed

[  196.253514] usb 1-1: device not accepting address 13, error -71

[  196.293517] hub 1-0:1.0: unable to enumerate USB device on port 1

导致鼠标不能使用，查找半天原因，发现是板子HOST接口的D+和D-接反了，把它接正过来，鼠标能够正常使用，正常的LOG例如以下：

[   71.114150] ==13==> hub_port_init 1

[   71.118120] Plug in USB Port2

[   71.304122] usb 1-1: new low speed USB device number 3 using Mstar-ehci-2

[   71.755549] input: OM as /devices/platform/Mstar-ehci-2.1/usb1/1-1/1-1:1.0/input/input3

[   71.766243] generic-usb 0003:04F3:0232.0002: input,hidraw0: USB HID v1.11 Mouse [OM] on usb-mstar-1/input0

表明可以正常使用，特此记录。